One Piece: The user of the Nen-Nen Fruit, who overturned the sea.

Above Impeldown, the underwater prison, in the clouds.

Roy watched as the warship carrying Garp and Aokiji gradually disappeared into the distance.

Only after confirming that they were far away from the area did he slowly stand up.

"That's about it."

Roy muttered to himself, his figure flashing through the air, and the next moment he appeared on the outer wall of Impelton.

This enormous underwater prison resembles a giant bowl overturned on the seabed.

The entire structure is constructed from a mixture of sea stone and a special alloy.

It is said that even Whitebeard's Tremor-Tremor Fruit could not easily destroy its outer wall.

But today, it welcomed an uninvited guest.

Roy floated on the outer wall of Impelton, his eyes closed.

The Observation Haki spread out like mercury, silently seeping into the thick wall.

In his deepest perception,

The sixth level, Infinite Hell, is where the World Government holds the most dangerous prisoners.

At that moment, Roy sensed two familiar presences—

One is as steady as the earth, the other as violent as a hurricane.

Roger, and the Golden Lion.

"Found it."

Roy opened his eyes, his pupils shimmering faintly in the night.

He raised his right hand and gently tapped the wall with his index finger.

"Command Space Folding".

An invisible spiritual force surged from his fingertips, spreading out like ripples.

Under Roy's mental influence, the seemingly indestructible wall in front of them began to undergo subtle changes.

The space itself begins to distort and fold, like a passage formed by folding paper.

The originally heavy walls seemed to transform into illusory images at this moment.

Roy could clearly see what was behind the wall—an empty storage room filled with spare supplies and tools.

Roy took a deep breath and took a step forward.

The next second, his figure passed through the wall several meters thick as if passing through water.

They appeared silently in the storage room inside Impelton.

The entire process did not trigger any alarms or alert anyone.

The spatial structure of the walls is only temporarily folded, not destroyed.

Therefore, even the most sophisticated detection instruments could not detect the anomaly.

Roy looked around to confirm that there were indeed no surveillance Den Den Mushi in the room.

He raised his right hand and drew a circle in front of him.

An invisible spiritual force surged forth instantly, enveloping his entire body like a flowing stream.

As his mental energy fluctuated, Roy's figure began to blur and become transparent, eventually disappearing completely into the air.

This isn't true invisibility, but rather the use of the Nen-Power Fruit's ability.

It refracts surrounding light and energy fluctuations to achieve a visual cloaking effect.

After doing all this, Roy pushed open the door to the storage room and went out.

Impeldown, Level 4, the Scorching Hell.

Roy quickly floated over the first three levels of Impel Down, where the pirate presence was so weak it was almost negligible.

It wasn't until they arrived at the scorching hell that the environment began to catch Roy's attention.

The environment here lives up to its name; the air is thick with a scorching heat.

The floor was a scorching hot iron plate, and huge boilers were installed on the walls, engulfing the entire floor in high temperature.

The prisoners' strength has also increased slightly, but there are still no ones that Roy should pay attention to.

Roy's mental barrier can isolate him from most of the influence of the external environment.

In the corridor, a prison guard was pushing a cart full of supplies past.

Roy followed silently behind him, and as the jailer turned a corner, Roy suddenly made his move.

An invisible spiritual force pierced the jailer's brain like a fine needle.

The jailer's movements suddenly stopped, and his eyes became empty.

Roy's voice rang directly in his mind.

"Tell me the way to the sixth level of infinite hell."

Under mental control, the jailer offered no resistance and mechanically answered.

"From here, go straight ahead and turn right at the third intersection."

There is an elevator leading to the fifth floor... After reaching the fifth floor,

"After passing through the frigid hell, there is a secret passage in the central area..."

Detailed information unfolded in Roy's mind like a map.

After noting down the route, Roy snapped his fingers lightly.

The jailer's body went limp, and he collapsed to the ground.

Roy dragged him to a secluded corner, making sure they wouldn't be discovered for a while.

Then continue along the route you obtained.

He encountered many patrolling jailers and guards along the way, but with the dual protection of mental invisibility and Observation Haki prediction,

Roy moved through the corridors of Impelton like a ghost, without disturbing anyone.

Half an hour later, Roy arrived at the entrance to the fifth level of the extreme cold hell.

The massive metal door slowly opened, and a bone-chilling cold blasted out.

The fifth floor is an ice and snow world where the temperature remains at tens of degrees below zero all year round. Ordinary people would freeze to death in just a few minutes here.

But Roy simply adjusted the strength of his mental barrier and easily withstood the cold.

Following the route provided by the jailer, he quickly traversed this icy hell and arrived at the secret passage in the central area.

This is an inconspicuous hidden door, concealed behind a thick layer of ice. If you didn't know its exact location, you wouldn't be able to find it at all.

Roy placed his hand on the ice, and his mental energy vibrated slightly.

Click—click—

Fine cracks appeared on the surface of the ice, and then the entire ice layer shattered like glass, revealing the metal door behind it.

There was no keyhole on the door, only a small authentication panel about the size of a palm.

"Do I need permission...?"

Roy squinted and placed his hand on the authentication panel.

Mental energy, like a virus, invaded the panel's interior, cracking its encryption program.

Three seconds later, a soft "beep" sounded, the red light on the panel turned green, and the heavy metal door slowly opened.

A downward spiral staircase appeared before Roy, leading to endless darkness at the top.

The sixth level, the infinite hell.

Roy slowly descended the stairs, and the further he went, the more oppressive the surrounding environment became.

An indescribable heaviness permeated the air, the resentment and despair left behind by countless powerful individuals who had been imprisoned for so long.

Finally, Roy reached the top of the stairs.

A huge iron gate blocked my way, with no markings on it, only a cold metallic gleam.

Roy didn't open the door, but instead silently let his Observation Haki seep in through the crack in the door.

The interior of the Infinite Hell was even more spacious than he had imagined.

There aren't many cells here, but each one is exceptionally sturdy, with walls and railings made of high-purity sea stone.

In the deepest cells, Roy sensed two familiar presences.

At that very moment, the prisoners in the cell all noticed this unfamiliar Observation Haki.

"Who?!"

"Someone has come in!"

"Not a jailer...this aura..."

The prisoners stirred; despite being imprisoned for many years, their senses remained sharp.

In the deepest cell, Roger sat cross-legged on the floor, whispering something to the Golden Lion.

When Roy's Observation Haki swept across the area, Roger suddenly stopped, a look of surprise on his face.

"This aura..." Roger murmured.

Golden Lion noticed it too, and his expression instantly turned ferocious: "It's that brat...!"